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Discography is an imaging test. It involves injecting a contrast material into a disc in the spine and taking an
x-ray. An x-ray is a test that uses radiation to take a picture of structures inside the body. The contrast material helps the disc appear more clearly on the x-ray.
This test is used to detect if a
or otherwise abnormal disc is a source of pain. Discs are small, circular cushions between the vertebrae (bones) in the spine. A herniated disc occurs when a disc in the spine bulges from its proper place. Herniated discs can press on the nerves and cause severe pain. In some cases, they can cause pain themselves, but often an abnormal disc is not painful.
Pregnancy test—this test is not usually needed on pregnant women
Before your test:
Arrange for a ride home and for help when you return after your procedure
Remove any metal objects from your body, such as jewelry, hearing aids, or dentures
Description of the Test
You will lie on your stomach or side on a table. A technician will help place you into position. You may be given antibiotics through an IV. You may receive an injection of local anesthetic into the skin on your back. This will be done to reduce pain from the needles.
Your doctor will use an imaging test called fluoroscopy. It combines x-ray technology with a TV screen to help guide needles into the discs. A contrast dye will be injected into the center of each disc. If the disc is normal, the liquid will remain in the center of the disc. If it is abnormal, the x-ray will detect any spreading or leaks.
During the exam, you will be asked to rate any pain that is associated with the injections. This can help your doctor find out if it is the abnormal disc that is causing pain.
After this test, your doctor may do a
to see the extent of spread of the contrast dye.
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